One night, as meteors streak across the star-studded sky, Shion Pavlichenko becomes a Contractor. Despite her brother's transformation, Shion's twin sister Suou continues to live a fairly ordinary life, attending middle school with her friends and getting caught up in the awkwardness of growing up. However, everything changes when her home is invaded by a masked man cloaked in black, destroying any sense of normality she once had. Revealed to possess latent Contractor abilities of her own, Suou is caught between family, friends, and her own sense of purpose as she ventures into the ruthless world of cutthroats and espionage that Contractors call home. Meanwhile in Tokyo, investigation surrounding Hell's Gate's sudden collapse is underway, and prophetic signs of doom point in the direction of a silver-haired doll.

The story starts off with a face-off between two rival heroes, ZET and ALPHAS, and then traces their origins - Jin Kanzaki, a young man with the ability to transform into a superhuman being known as ZET, and Kouga Amagi, a young man with a strong sense of justice who uses technology to fight as ALPHAS. The fates of these two men and those around them intertwine as they fight to protect mankind and destroy monstrous abominations known as Players. (Source: ytv ENGLISH)

Taking the world by storm, the card game Cardfight Vanguard has influenced many to integrate card games into their everyday lives. Players of the popular game are called cardfighters, and they frequently battle each other in card shops. The game has inspired many people, one of which is the quiet and timid Aichi Sendou who is often ridiculed and bullied by his peers. Whenever he feels down, he takes a glance at Blaster Blade—a legendary rare card given to him when he was young—and gains the motivation to move on with his life. However, one day, school bully Katsumi Morikawa notices Aichi's treasure and snatches the card away from him. After a turn of events, Aichi soon discovers that the card is now in the hands of Toshiki Kai, a cardfighter who has become the strongest in town despite having only recently arrived. To make matters worse, Kai refuses to return the card unless Aichi defeats him in a cardfight. Much to everyone's surprise, Aichi rises up to the occasion. As he musters up his courage and pictures himself winning this decisive battle, Aichi begins to find his way into the adventurous world of Cardfight Vanguard.

An exoskeleton weapon engineered by Japan, Infinite Stratos (IS) can be piloted only by women. Its power and combat prowess are so immense that an international treaty has been signed banning its use as a military asset. When it is discovered that 15-year-old Ichika Orimura is the only male capable of steering an IS, he is forcibly enrolled in the Infinite Stratos Academy: an all-female boarding school, the students of which graduate to become IS pilots. At this training school, Ichika is reunited with two of his childhood friends, Houki Shinonono and Lingyin Huang, and befriends Cecilia Alcott, an IS representative from the United Kingdom. Guided by the legendary pilot Chifuyu Orimura—their strict homeroom teacher and Ichika's older sister—Ichika and the girls will need to use everything at their disposal to defend themselves and their academy against the dangers that will arise during the course of their thrilling school life.